/*
 * Copyright (c) 2011-2012 Alexander Dubu
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * o  Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * o  Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * o  Neither the name Axil nor the names of its contributors may be used to
 *    endorse or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package axil.framework.localization.loader;

import axil.framework.localization.Locality;
import axil.framework.localization.Namespace;
import axil.framework.localization.xml.ResourceSet;
import axil.framework.resource.ResourceManager;

import java.io.Reader;

import static axil.framework.Functions.close;
import static axil.framework.Functions.xml;


/**
 * The standard resource loader for localization assets.
 */
public class ResourceFileLoader implements ResourceLoader {
	public ResourceFileLoader() {
	}


	/**
	 * Load the definitions of the resources for the given locale and namespace.
	 * If this loader is unable to find any such definition, then a null is
	 * returned.
	 */
	public ResourceSet load(Locality locale, Namespace ns) {
		String name = locale.identity() + '/' + ns.dotted() + ".xml";
		String path = "data/resource/" + name;
		Reader reader = ResourceManager.instance().open(path);
		if (reader != null) {
			ResourceSet res = xml(ResourceSet.class, name, reader);
			close(reader);
			return res;
		}
		return null;
	}
}
